How to minimize additive blooming and migration in flexible packaging

June 13 12:32 2024

In the intricate world of flexible packaging, where aesthetics, functionality, and performance converge, the phenomenon of additive blooming can present a significant challenge. Additive blooming, characterized by the migration of additives to the surface of packaging materials, can mar the appearance of the packaging, compromise product integrity, and diminish consumer satisfaction.

Understanding Additive Blooming

Additives are commonly incorporated into flexible packaging materials to impart specific properties such as slip, anti-block, and UV resistance. However, under certain conditions, these additives may migrate to the surface of the packaging film, resulting in blooming. Additive blooming manifests as a visible haze or whitening on the surface of the film, detracting from the visual appeal of the packaging and potentially impacting product quality.

Causes of Additive Blooming

Temperature Fluctuations:

Rapid changes in temperature during storage or transportation can trigger additive migration, leading to blooming on the surface of the packaging material.High Humidity Levels:

Elevated humidity levels can accelerate the migration of additives to the surface of the film, exacerbating blooming issues, especially in moisture-sensitive materials.

Incompatible Additives:

Incompatibility between different additives or between additives and the polymer matrix can promote migration and blooming, particularly when using blends or masterbatches.

Processing Conditions:

Improper processing parameters such as high temperatures or excessive shear forces during extrusion can exacerbate additive migration and blooming.

Strategies for Controlling Additive Blooming

Optimize Processing Parameters:

Fine-tune extrusion parameters such as temperature, screw speed, and residence time to minimize shear-induced migration of additives and prevent blooming.

Utilize Migration-resistant Additives:

Select additives with low migratory tendencies or encapsulated formulations that minimize surface migration, reducing the risk of blooming.

SILIKE Launched Non-Migratory Slip Additives, to solve this blooming issue effectively.

• Stable Performance: SILIKE Non-Migratory Slip Additives can maintain consistent slip performance over time by remaining anchored within the polymer matrix. This ensures that the desired slip properties are preserved from the film’s production to its end use.

• Enhanced Durability: SILIKE Non-Migratory Slip Additives outperform migratory counterparts in terms of durability. Their resistance to migration minimizes the risk of surface stickiness, blooming, or migration, preserving the film’s clarity and aesthetics, and enhancing its overall durability and shelf life.

• Improved Processability: SILIKE Non-migratory slip additives provide a low coefficient of friction (COF), facilitating smoother processing and handling of the film during manufacturing and converting operations. This can lead to reduced downtime, improved throughput, and enhanced overall efficiency in the production process.

• Enhanced Packaging Quality: SILIKE Non-migratory slip additives ensure consistent and long-lasting slip performance, even in high-temperature conditions, while preserving print quality, heat sealing, transmittance, and clarity. It also eliminates the issue of white powder buildup, contributing to the integrity and visual appeal of the packaging.

• Applications of SILIKE Non-Migratory Slip Additives cover various film manufacturing processes, including blown film extrusion, cast film extrusion, laminating and coating, printing and converting, as well as Flexible Packaging

Our SILIKE Non-Migratory Slip Additives are super important for solving challenges in the flexible packaging industry. They help with better processing, stable performance, heat resistance, and non-migratory properties, which are all key for improving the efficiency and quality of packaging films. If you want to boost your flexible packaging efficiency, our advanced slip additive solutions are the way to go! Get in touch with us for more details.

Tel: +86-28-83625089, email: [email protected], or visit

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Company Name: Chengdu Silike Technology Co., Ltd.
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